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Yar_Client::__construct() is a constructor function in PHP that is used to create instances of the Yar_Client class. Yar is a PHP extension that allows communication between PHP clients and servers using RPC (Remote Procedure Call) protocol.

The Yar_Client::__construct() function takes two arguments: the server URL and optional options. The server URL specifies the location of the server to which the client will connect. The options argument allows you to pass additional configuration settings to the client, such as request timeout or whether to use SSL.

Here is an example of how to use the Yar_Client::__construct() function:


$client = new Yar_Client('http://example.com/service'); // Create a new client instance with the server URL

// You can also pass options as the second argument
$options = array(
'timeout' => 10, // Set the request timeout to 10 seconds
'ssl' => true, // Use SSL for secure communication
);

$client = new Yar_Client('http://example.com/service', $options); // Create a new client instance with options


Once you have created a client instance, you can use it to call remote methods on the server using the Yar_Client::call() function.

Note: The Yar extension needs to be installed and enabled in your PHP environment to use the Yar_Client::__construct() function and other Yar features.